Moreover, correlations between anxiety symptoms registered in HARS and BDNF levels were not statistically significant among the normal (r = 0.34, t = 1.0, df = 8, p = 0.3), moderate (ρs = 0.17, p = 0.7), and severe groups (r = 0.4, t = 1.3, df = 10, p = 0.1). This evidence concerns the gene BDNF and Anxiety.